/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany.sca.interfacedef.java.xml;
import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;
import org.apache.tuscany.sca.assembly.Extension;
import org.apache.tuscany.sca.assembly.ExtensionFactory;
import org.apache.tuscany.sca.assembly.xml.Constants;
import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
import org.apache.tuscany.sca.contribution.processor.StAXArtifactProcessor;
import org.apache.tuscany.sca.contribution.processor.StAXAttributeProcessor;
import org.apache.tuscany.sca.contribution.resolver.ClassReference;
import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
import org.apache.tuscany.sca.contribution.service.ContributionReadException;
import org.apache.tuscany.sca.contribution.service.ContributionResolveException;
import org.apache.tuscany.sca.contribution.service.ContributionWriteException;
import org.apache.tuscany.sca.interfacedef.InvalidInterfaceException;
import org.apache.tuscany.sca.interfacedef.java.JavaInterface;
import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceContract;
import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceFactory;
import org.apache.tuscany.sca.monitor.Monitor;
import org.apache.tuscany.sca.monitor.Problem;
import org.apache.tuscany.sca.monitor.Problem.Severity;
import org.apache.tuscany.sca.monitor.impl.ProblemImpl;
/**
*
* @version $Rev: 803875 $ $Date: 2009-08-13 14:14:21 +0100 (Thu, 13 Aug 2009) $
*/
public class JavaInterfaceProcessor implements StAXArtifactProcessor<JavaInterfaceContract>, JavaConstants {
private JavaInterfaceFactory javaFactory;
private ExtensionFactory extensionFactory;
private StAXAttributeProcessor<Object> extensionAttributeProcessor;
private Monitor monitor;
public JavaInterfaceProcessor(ModelFactoryExtensionPoint modelFactories,
StAXArtifactProcessor extensionProcessor,
StAXAttributeProcessor extensionAttributeProcessor,
Monitor monitor) {
this.javaFactory = modelFactories.getFactory(JavaInterfaceFactory.class);
this.extensionFactory = modelFactories.getFactory(ExtensionFactory.class);
this.extensionAttributeProcessor = extensionAttributeProcessor;
this.monitor = monitor;
}
/**
* Report a exception.
*
* @param problems
* @param message
* @param model
*/
private void error(String message, Object model, Exception ex) {
if (monitor != null) {
Problem problem = new ProblemImpl(this.getClass().getName(), "interface-javaxml-validation-messages", Severity.ERROR, model, message, ex);
monitor.problem(problem);
}
}
/**
* Report a error.
*
* @param problems
* @param message
* @param model
*/
private void error(String message, Object model, Object... messageParameters) {
if (monitor != null) {
Problem problem = new ProblemImpl(this.getClass().getName(), "interface-javaxml-validation-messages", Severity.ERROR, model, message,(Object[])messageParameters);
monitor.problem(problem);
}
}
private JavaInterface createJavaInterface(String interfaceName) {
JavaInterface javaInterface = javaFactory.createJavaInterface();
javaInterface.setUnresolved(true);
javaInterface.setName(interfaceName);
return javaInterface;
}
public JavaInterfaceContract read(XMLStreamReader reader) throws ContributionReadException, XMLStreamException {
// Read an <interface.java>
JavaInterfaceContract javaInterfaceContract = javaFactory.createJavaInterfaceContract();
String interfaceName = reader.getAttributeValue(null, INTERFACE);
if (interfaceName != null) {
JavaInterface javaInterface = createJavaInterface(interfaceName);
javaInterfaceContract.setInterface(javaInterface);
}
String callbackInterfaceName = reader.getAttributeValue(null, CALLBACK_INTERFACE);
if (callbackInterfaceName != null) {
JavaInterface javaCallbackInterface = createJavaInterface(callbackInterfaceName);
javaInterfaceContract.setCallbackInterface(javaCallbackInterface);
}
// Handle extended attributes
for (int a = 0; a < reader.getAttributeCount(); a++) {
QName attributeName = reader.getAttributeName(a);
if( attributeName.getNamespaceURI() != null && attributeName.getNamespaceURI().length() > 0) {
if( (! Constants.SCA10_NS.equals(attributeName.getNamespaceURI()) &&
(! Constants.SCA10_TUSCANY_NS.equals(attributeName.getNamespaceURI()) ))) {
Object attributeValue = extensionAttributeProcessor.read(attributeName, reader);
Extension attributeExtension;
if (attributeValue instanceof Extension) {
attributeExtension = (Extension) attributeValue;
} else {
attributeExtension = extensionFactory.createExtension(attributeName, attributeValue, true);
}
javaInterfaceContract.getAttributeExtensions().add(attributeExtension);
}
}
}
// Skip to end element
while (reader.hasNext()) {
if (reader.next() == END_ELEMENT && INTERFACE_JAVA_QNAME.equals(reader.getName())) {
break;
}
}
return javaInterfaceContract;
}
public void write(JavaInterfaceContract javaInterfaceContract, XMLStreamWriter writer) throws ContributionWriteException, XMLStreamException {
// Write an <interface.java>
writer.writeStartElement(Constants.SCA10_NS, INTERFACE_JAVA);
JavaInterface javaInterface = (JavaInterface)javaInterfaceContract.getInterface();
if (javaInterface != null && javaInterface.getName() != null) {
writer.writeAttribute(INTERFACE, javaInterface.getName());
}
JavaInterface javaCallbackInterface = (JavaInterface)javaInterfaceContract.getCallbackInterface();
if (javaCallbackInterface != null && javaCallbackInterface.getName() != null) {
writer.writeAttribute(CALLBACK_INTERFACE, javaCallbackInterface.getName());
}
// Write extended attributes
for(Extension extension : javaInterfaceContract.getAttributeExtensions()) {
if(extension.isAttribute()) {
extensionAttributeProcessor.write(extension, writer);
}
}
writer.writeEndElement();
}
private JavaInterface resolveJavaInterface(JavaInterface javaInterface, ModelResolver resolver) throws ContributionResolveException {
if (javaInterface != null && javaInterface.isUnresolved()) {
// Resolve the Java interface
javaInterface = resolver.resolveModel(JavaInterface.class, javaInterface);
if (javaInterface.isUnresolved()) {
// If the Java interface has never been resolved yet, do it now
ClassReference classReference = new ClassReference(javaInterface.getName());
classReference = resolver.resolveModel(ClassReference.class, classReference);
Class javaClass = classReference.getJavaClass();
if (javaClass == null) {
error("ClassNotFoundException", resolver, javaInterface.getName());
return javaInterface;
//throw new ContributionResolveException(new ClassNotFoundException(javaInterface.getName()));
}
try {
// Introspect the Java interface and populate the interface and
// operations
javaFactory.createJavaInterface(javaInterface, javaClass);
} catch (InvalidInterfaceException e) {
ContributionResolveException ce = new ContributionResolveException(e);
error("ContributionResolveException", javaFactory, ce);
return javaInterface;
//throw ce;
}
// Cache the resolved interface
javaInterface.setUnresolved(false);
resolver.addModel(javaInterface);
}
}
return javaInterface;
}
public void resolve(JavaInterfaceContract javaInterfaceContract, ModelResolver resolver) throws ContributionResolveException {
// Resolve the interface and callback interface
JavaInterface javaInterface = resolveJavaInterface((JavaInterface)javaInterfaceContract.getInterface(), resolver);
javaInterfaceContract.setInterface(javaInterface);
JavaInterface javaCallbackInterface = resolveJavaInterface((JavaInterface)javaInterfaceContract.getCallbackInterface(), resolver);
javaInterfaceContract.setCallbackInterface(javaCallbackInterface);
}
public QName getArtifactType() {
return INTERFACE_JAVA_QNAME;
}
public Class<JavaInterfaceContract> getModelType() {
return JavaInterfaceContract.class;
}
}